Femtosecond laser-induced formation of gold-rich nanoalloys from the aqueous mixture of gold-silver ions

Shunichi Sato, Yuliati Herbani, Takahiro Nakamura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The synthesis of gold-silver (AuAg) nanoalloys of various compositions has been performed by direct irradiation of highly intense femtosecond laser pulse in the presence of polyvinylpyrrolidone (PVP). The mixture of Au and Ag ions of low concentration was simply introduced into a glass vial and subjected to femtosecond laser pulses for several minutes. The AuAg nanoalloys of 2-3nm with reasonably narrow size distribution were formed, and the position of the surface plasmon resonance (SPR) increased monotonically with an increase in the gold molar fraction in the ion solutions. The high resolution transmission electron microscope (HRTEM) images exhibited the absence of core-shell structures, and the energy dispersive X-ray spectroscopy (EDX) analysis confirmed that the particles were Au-rich alloys even for the samples with large fraction of Ag∧+ ions fed in the solution mixture. The formation mechanism of the alloy nanoparticles in the high intensity optical field was also discussed.

Original languageEnglish
Article number154210
JournalJournal of Nanomaterials
Volume2010
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Femtosecond laser-induced formation of gold-rich nanoalloys from the aqueous mixture of gold-silver ions'. Together they form a unique fingerprint.

Cite this